Behavior
Jumping spiders are generally diurnal, active hunters. Their well-developed internal hydraulic system extends their limbs by altering the pressure of body fluid (hemolymph) within them. This enables the spiders to jump without having large muscular legs like a grasshopper. Most jumping spiders can jump several times the length of their body. When a jumping spider is moving from place to place, and especially just before it jumps, it tethers a filament of silk (or dragline) to whatever it is standing on in order to protect themselves if their jump should fail. Should it fall for one reason or another, for example if the prey shakes it off, it climbs back up the silk tether. Some species, such as Portia will actually let themselves down to attack prey such as a web spider apparently secure in the middle of its web. Like many other spiders that leave a practically continuous silk trail, jumping spiders impregnate the silk line with pheromones that play a role in social and reproductive communication, and possibly in navigation.
Certain species of jumping spiders have been shown by experiment to be capable of learning, recognizing and remembering colors, and of adapting their hunting behavior accordingly.
Read more about this topic: Jumping Spider
Famous quotes containing the word behavior:
“No one is without Christianity, if we agree on what we mean by that word. It is every individual’s individual code of behavior by means of which he makes himself a better human being than his nature wants to be, if he followed his nature only. Whatever its symbol—cross or crescent or whatever—that symbol is man’s reminder of his duty inside the human race.”
—William Faulkner (1897–1962)
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—Leontine Young (20th century)